| Irmo to Benavente | 3,925.74 mi (6,317.87 km) |
| Irmo to Bombarral | 3,900.89 mi (6,277.88 km) |
| Irmo to Bougado | 3,885.15 mi (6,252.54 km) |
| Irmo to Braga | 3,887.43 mi (6,256.21 km) |
| Irmo to Braganca | 3,963.22 mi (6,378.19 km) |
| Irmo to Cabeceiras de Basto | 3,907.62 mi (6,288.71 km) |
| Irmo to Cacem | 3,904.45 mi (6,283.61 km) |
| Irmo to Cadaval | 3,904.47 mi (6,283.64 km) |
| Irmo to Caldas da Rainha | 3,898.74 mi (6,274.41 km) |
| Irmo to Calheta | 3,630.44 mi (5,842.62 km) |
| Irmo to Camara de Lobos | 3,641.40 mi (5,860.27 km) |
| Irmo to Canico | 3,649.67 mi (5,873.57 km) |
| Irmo to Cantanhede | 3,904.98 mi (6,284.45 km) |
| Irmo to Carregal do Sal | 3,932.64 mi (6,328.97 km) |
| Irmo to Cartaxo | 3,922.38 mi (6,312.46 km) |
